<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>Insert title here</title>
		<script type="text/javascript">
			alert("第二种引入方式");
			
		</script>
		<script type="text/javascript" src="frist.js">
			//如果引入了js文件，则不能在标签体内写js代码 
		</script>
	</head>
	<body>
		<input type="button" value="点我试试" onclick="alert('试试就试试')">
	</body>
</html>
